Visit two ofcambodias most important historicsites on this convenienthalf day tour in phnom penh learn more about thenotorious khmer rouge regime withself guided 1 hour 15 minute tours audio guides and in house tour guide service available extra costof both prison s21and thekilling fieldshotel pickup drop off and round trip transport by shared shuttle is included and an english speaking bus attendant will be on hand to help with any questions